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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '132d89da3893b5804a29cc2cbf9717c38f4b96f0b833ba6162464753642d1637' 
  AND token = 'aa4WTG2ZL7IG2lyplsJtalUmT31e3rCcCZ4y+Td35kY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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