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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed3f14e7f483bfed977086ac122f8235a616a260a43c3c7d435d7022e53c14cc' 
  AND token = 'HDic3+oSUQrne4olGIOQ+5FmiZ/bgJG52vWLltGF0QI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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