Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f08ab6be138520a3d1f9c479a9479650c0fe59b8a4de2549f207035050732b89' 
  AND token = 'TMB0mtL0Fob8m2AkhUKppRfy+ol40T+k2CCJUIJNnqk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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