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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95f8e3e107780e41d92f6fbf538df66d411b0b715e3ccc4ef6e2b16436532eb2' 
  AND token = 'CN00aGofC66kp/Z4qCmIYcmJ6w/llSiqKN8aP1Wkb94=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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