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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6220951a12f60d16dcff75f1b9ca9af6332a79a23b0222c33b04bdf3acdd65b5' 
  AND token = 'WHOw/GQBMMUw2xoL3oGDVSjc103uVTDc34qIwDCX4zg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00068

JSON explain

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