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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07caeba91754766c1220d4f07185af440399a7b10932a5490b2d07cb2447652e' 
  AND token = 'xaRpgC1myn5ox/Rg1O2GWtWy94vQs7dTjVT2KhYodwo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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