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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '22095eeb62db2357dd9c9c9bb1d5be3c1c882b7e69a73a5a493851f5759a0782' 
  AND token = 'F2cK7d99oNq2Ef3Ra1V1cjugnGKXADO7gew4Tr3eJbw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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