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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2f220cf4c2c5ab2f83558eeb76f321e036e2e5d34066d7d78952c334a2f12b6' 
  AND token = 'oAN2Ci5+KwTYlsvRG484ZOW589Wm+AeO4JylX68HkX0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}