Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '054775eac84a2dd5dcee7b87fa64a82468b7b028a9a2e6366d3e87af92030270' 
  AND token = '6ImcZjuBhCmcYSBmKXr0MfnY2Q6vfVFwbfli1DIAPgY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00062

JSON explain

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