SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8589bb58208576a21fbf43e3d72bd7b707a4061b85fb88c137d1de961e7955a8' 
  AND token = 'B0M+q2dj8FzB96+4t6IAtFXJlxqZsJTzP/CvWHidcdQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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