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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57000fcc7f43167374f681631e5d15dbbb62327161772fb90b2a57db00b8ea21' 
  AND token = 'f61HcIUEEvnFuhQZf9HlXfLi9Tp4NxSp87yJItf/Jjw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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