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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62c04b03f281098f30d07cd361e5b83290b2fe2255daa0ce91788fee59674550' 
  AND token = 'k58o95HecG8zA2ABB45xWAIsbDsoZDhq5v7xapKeG/s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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