Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46c55645ea49fe58749fe2ba6306c77d0d37858447359931a0ff2777bcd2acc6' 
  AND token = 'uoBIZM3F2LIMYh8j36i6FPK9l0z7mKcFZQINeQJov7U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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