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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cee9f556a858cae7a4ca8ab62de5c6b526772cb8a1a2e8c5b91214348eb2fd4b' 
  AND token = 'QhokPvzJzuG0fJcdnJ8LlKvhgOoXOp1DHQ8SUBnE7tI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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