SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd6705343666aa00d2e7c64f2eadc9bb8a56261ab7c11d387ff658da3a8139a5f' 
  AND token = 'WW/XJ3vwg1kSoGXmPVHfnCPS8MaZ2xd7KQHkC2rBT5o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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