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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5898a5e1b5cac924a194e78ec3189684b3866cca16c83c07a806c512ac0320bc' 
  AND token = 'Tqej5QxdyAKMHKE6J6dMfocFRn7ormbuybtL8UfE4kY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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