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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5c6903bd3fa6488d7efc9c51cf63e7ca517519498b3ebb24e3fc466a58803577' 
  AND token = 'v2eF/9jSt/IZpc1jdd2tpGNLdgicqlUbtxEM4wk1qP8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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