Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abf8cd0ef48134b94a5067eab89427888e142d1f47b3151423dafdcba068a41a' 
  AND token = 'o42rQaQSjpLy3x1p24Rsfda8JHUCNMnq6FDB4vbAtG0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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