Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7425886c732e4f233dc9c8985cac819ef4dfca87ba0f2c1a1c23cbe46d4b8e74' 
  AND token = 'Ee9/VMrg7+UlxDqbLYUWbOqrm583amyN1cSHYvhQBPY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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