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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8724e7005e2a3e1226c52427a1e8ea884340043f4f4365254efca866ad04f680' 
  AND token = 'WT7eNQpPxtpy8uYSslIoWJGN5ux3L0n/KafuGUeuj88=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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