Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dc652a47239fb9f4dfc3748eebdb5ddeb622c142f352aa26d3daa1d7f33f3243' 
  AND token = 'OSWTxyt/UTomBpo/0syqc2L/JzkI3kx2GqAT40YUC48=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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