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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f634b16942672b0f2a75d15375ae330196755eed63b866df354022be803d4fdb' 
  AND token = 'G2m1Ta69m+7x+ZCy727NfVH09mkKZh1eF0YJfOEPQ1c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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