SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7e34210f071801e872942c66ec1ce523d15236071e657b3cd07b4fcc1ea48357' 
  AND token = 'aWrTjoPEhlKJnl4uQ9bv3LY1s4KKZQjIuC1rqZRChfs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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