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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'caa7328de05ad7dd5a63bffd774ab24277554880f215b50fd617ae1157cdcb6b' 
  AND token = 'owEbr95LBgrOWELKTbmUULaz8ZxYgPm8AybdCiB56Sg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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