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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22990134328c576dd24a7a4c19a7442086dabb4ef86751ac5c09975cee2748d4' 
  AND token = 'BYUrwwibur9LvsIGu9/RppCSGK2O79gT+7nxdIkVm1Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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