Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53f31d2151134c0f181d58a457902a0318f9ef27af89b2a71b4737d7063433e8' 
  AND token = 'u7poa14M2NFsDEy1JxtNR7rZRoC0Wnob4vkMagLFAbc=' 
  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"
    }
  }
}