Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f30af809854cf378b953757a65ceb8f033ac57ad466ab7ac9eca531bcaff11b9' 
  AND token = '7VDzvvQSfXL4NiehcpAu71yV/S4tbFK+wYFLmAVwMoM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}