Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8eb691babec7acd6c3410adfc3a179dceed6f63cd6ffe90def465ccac277b4be' 
  AND token = 'pXp7Kkqk3NA9RwfcaF966W9YvKDN5CUQ7spIHldnm1w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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