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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fedafb601b2e437177481f3bb79cb4d7ddae64b5641e946cc4560e59230e87f0' 
  AND token = 'Rx4cSKjCmYerdJ9liKuoQVAHr9KT9Umu+BzAqJTKR6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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