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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd709e7c27c53bd17ba2d24ea9c122d761ec518ed25d4c0c33907d622abc3132f' 
  AND token = '8pbeAurejVmrKxbBTzjMp/E+LDDVEE6HIa0E2MhfLRA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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