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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '49e5d329fa1f1eff0e7277588ad75921f76d06379e6514ad11dcaa14139d9709' 
  AND token = '9S5wOxEDCrAsOeOCtbjJlq1qqWK2c0ULoOZYTXIwU1U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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