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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72138e257742b37e11b6a005eaa9d492c57649dc3f1823d275ab383e099dc73f' 
  AND token = 'Ye+p+z9e/EZj7tEaQEAlccvv/w9XFbwBmBHE+kloKx0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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