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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ce80490b52c95b39dc23d38099fe26cfa07b2fb5c428348353d624e4ba9b3d9' 
  AND token = 'Gof16GtrAUDXFvb3M/9708cGY9BPJWukAuW3ophk1lI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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