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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3ae1debf672119693d287bc7506e5c7cd869cbf879820cac7d4d7734d186292' 
  AND token = 'rUCXxvJwXrUQzTt9tTNsKV0FBmHUu4JtkcXFf6S8qLw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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