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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64cc1595dad8a1d39d6a6aa38672b12cc1b12800bdda0ca9421cacb1b3e167f8' 
  AND token = 'IhHNsbu4jKYSgvSWkF9id5Qvs+nD1WZmB2C35SP4wlM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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