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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aef4ef3a560db6bda9c65ba93e3d1fd9dafcdee4f3e3890d0f349702e2cd646d' 
  AND token = 'qddYtpKc63h7zfvOfXEpRx2iay2tG0we/iBaJCqP0KU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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