Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '887457102e7ee0b3302b336e53a74ea8a7725f6933ef05bab775927f5ec76753' 
  AND token = 'ZqXhPlgcYczfPKfmmIYgfquhRWGY5rRAO+6m568Qdb8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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