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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c0f057e32739038528aabd27866372fa1cb61a39d57ef8dd0d96540d5910277b' 
  AND token = 'LV5Crhj7ScAUHwuhQdVc4F/4CKsmH2V0HTiHuYbCryc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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