Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea8cd8a7be62a536282a99e4368d4d49fc1f6ade6f3e649d421fa0b3e65fae50' 
  AND token = 'A/7HvksSAWltWciPX4R9WMzg6Y2GLtglA2L+bwNUizs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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