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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9039c432dc61e5e041186bd3c319cd56bd3d53d04f557cebaab173a60fb15acf' 
  AND token = 'SuFwRc2Qw49tZD/43EalKVU6ZvWSecoqsbcX0ZR1GNk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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