SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bcbb96bbc012b8efcc18d313a3f9fc977263010f28944aae758e69583a0b8acf' 
  AND token = 'wDujY+nWXPruuHCEGL1Qew0s2hL5Kwh15yVcpFxuhuo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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