Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c5ca9805f782616ab2669dea07e5a38a8fa7e9c215f4e5c81147238a5595c5e' 
  AND token = 'SMRXzocdyPr1reOXl1spQmxRJ/SJVHfRe9F7pu06zWw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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