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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40753861701482a0356e000b4d400880e248fde185e70fa204556b0df53781b5' 
  AND token = 'sCqmvtwGn0h4oWxmRk7r+NCD8b0QLd1tm5R3TxP2tfA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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