Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ffd82f39fd6e5c2e053bf3389dd2e12d3df1838a428c316dd0996d36393ebc8a' 
  AND token = 'fm5my6ZlcRyVikokC0Ytq+xIe2aSRZcoYNP2LRFq6L0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00129

JSON explain

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