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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '09fff94705eeaf0c1b7f65d5899046d74278ced8d66621760bdd31a27d122e73' 
  AND token = 'uRZuOxyThx5RDWhiy9f8EERJR44lkKF0rP/uJA/ru6E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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