Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34130ff6e2f00c873c8a3217dde82ed4dfdfad9536da33667637b3421955038d' 
  AND token = 'mH8qiAPoW3usV0Bew6LQnnKnYzUVmhk59ma2wEuPHDA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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