Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccdff5107e9747c9ef6f6ee6773e07774c3c05ec07e73655cf6bd7e80e7f2bda' 
  AND token = 'D/tza8FEI4ZBmoAfxm9/op+xkWekQGyHh0VBOBRvgVg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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