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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0d61af5ce651e8c6e9166c653c9eedf1c67e0113a36bc40f965ac12ae412e25' 
  AND token = '4+y8t9Y4AY6sIrdWZOzhJHLQcbiViyHraOoTUor8Fr4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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