SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b4372bdb8c5905bf8c1952b33d91cb7a5d27f47816c52ae144eb8f7043236fe' 
  AND token = 'NbjXq4MuxB9hcRIORhAUGYoBNwT1XJSVAF71CILeaCo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00253

JSON explain

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