Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1398dc29b6d4da0846d6a4565205690f16e05ad9ddcccce4b8ffaada62ba0e00' 
  AND token = 'boaPqiryHp/GC2w3ZgKA/Boe0khKG4e2gGUokXjvL/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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