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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '001109f34f1052adb6911649f1cb85068295d3dbafc3a0dea39e21b5eb60216e' 
  AND token = 'Whc8m5QSBZGSy//GZ4IoaL9SjPX+3FLzpiJufoXigR4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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