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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44b7b56da6d54ecd842cf2bfaf97af439418b8bff99307a8a03688b3b7f5965e' 
  AND token = 'dexU//c1I1gdzTixaVsVX6J9i1C0xKhkQJL/2gt5ENs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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