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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04898cdaefa691304a07a4f4125a0d866d87160b03669b0167ea7eff48984083' 
  AND token = 'FrF+8U9iWh82qY2c7hN+301HP47qLiaG7k/AiwHA/sg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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