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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1291cae4909d326891bf889f5a0bd1d8b6f85893aeeb245e3017ced4e7710c22' 
  AND token = 'O+3IKF9u/toWw+7n6XCIdtKERQb+xUN4FNYjDAm/oBI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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