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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94d0e527c0cb1aa8ce5677f7ed3293b92134f6545d7cd5cddb62960d7aa591fa' 
  AND token = 'PEriqeUGkRPPO/LS+h83hoHScpf32MW5RgH6YNvrq5U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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