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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f32839dc7d05d8d67ad5efd2b472d4efcd6221604c24880ba90016ae79e78de' 
  AND token = 'GZ2CgUILSMxYofZPsuvftpTI+TIY/0Vweg8wnSWJZZk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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