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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ba22b8d6d28d25de82e00a797be65b02de18220b078ba59924fb25bd53caa74' 
  AND token = 'dAKKg5Z+hYUmcSgh54NHPAdjcWxb5kN7N+Pcd8INbTc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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