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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b04ab39d2f5b47dab18b6b66fe7e242ad8fb62ae433766a0055bf136a0d00e39' 
  AND token = 'AfBGWSlIHpVRZC/F80vK/U9d5jWcu9HYiLjXyf8aSNM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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