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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06007493fbe04edea38a9bdb8970659eb9370396932252b20c869a9d4f585c00' 
  AND token = 'WBH464c6bAW3Rc+gt4eM2lOujk6xSbWPelEUYco85Ow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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