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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6aebcd498f32a1a7211087331b284b20392b028c1a0b2b0ad6006437af801266' 
  AND token = 'DdPDic90ip2tQtSz2GulJspj5i6RLlZmWBHng/U/BME=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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