Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '90905cc6893d305f37e8fbdb0f8296e4e810d90188f6a02c14a2e02c9c215464' 
  AND token = 'Ej9dOtR1RhR4RScYKpB2MFQ3YIZ48qJVPGnDRh+wjHk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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