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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8bfcdd60c4668e348d7edb76d74315d2c46349a336bb7222c4e5f0d5437b3461' 
  AND token = 'SLQ7rtbpQ0WeH1B+WdO9zv2uM1m67A8sCbb5YhiPM+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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